STUDY OF THE VERTICAL SCATTERING PROPERTIES OF THE LITHOSPHERE BASED ON THE INVERSION OF P- AND S-WAVE PULSE BROADENING DATA
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dc.contributor.author | Gusev A.A. | |
dc.contributor.author | Abubakirov I.R. | |
dc.date.accessioned | 2020-12-24T08:52:34Z | |
dc.date.available | 2020-12-24T08:52:34Z | |
dc.date.issued | 1997 | |
dc.identifier | https://elibrary.ru/item.asp?id=20948386 | |
dc.identifier.citation | Volcanology & Seismology, 1997, , 4, 453-463 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/21319 | |
dc.description.abstract | The vertical distribution of the scattering properties of the lithosphere can be found using Bocharov's formula which describes the broadening of an incoherent pulse with distance as it propagates in a scattering medium with scattering varying along the raypath. For a piecewise constant scattering distribution, Bocharov’s formula yields a linear equation for every raypath that relates the scattering of the blocks traversed by the raypath to a parameter that defines the pulse width. This set of equations can be solved by least squares to find scattering distribution in a certain lithospheric volume. Records of P and S waves from local earthquakes with focal depths of up to 140 km made at six Kamchatkan stations were measured to determine the onset-to-peak delay times (400-600 measurements). These data were inverted for each station to find scattering for a layer-on-half-space model. The results did not differ much between the stations and yielded the following distribution: scattering was 0.02 1/km (P waves) and 0.008 1/km (S waves) in the upper layer 30-50 km thick and 5-10 times as low in the lower layer ((30…50)-140 km). The exact scattering of the lower layer was not evaluated. | |
dc.title | STUDY OF THE VERTICAL SCATTERING PROPERTIES OF THE LITHOSPHERE BASED ON THE INVERSION OF P- AND S-WAVE PULSE BROADENING DATA | |
dc.type | Статья |
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